Field studies on traffic noise-induced annoyance have predominantly used estimated outside noise levels. We intended to complement existing knowledge with exposure–response relationships that are based precise indoor measurements. Acoustic recordings inside the bedrooms of nightly road and ratings in following morning were obtained from 40 suburban residents (mean age 29.1 years ± 11.7; 26 fema...

American National Standards (ANSI Standards) developed by Accredited Committees S1, S2, S3, S3/SC 1, and S12 in the areas of acoustics, mechanical vibration shock, bioacoustics, animal noise, respectively, are published Acoustical Society America (ASA). In addition to these standards, ASA publishes a catalog Standards. To browse latest copy our catalog, visit website at https://acousticalsociet...

Background and Objectives: Digital signal processors are widely used in energy constrained applications in which battery lifetime is a critical concern. Accordingly, designing ultra-low-energy processors is a major concern. In this work and in the first step, we propose a sub-threshold DSP processor. Methods: As our baseline architecture, we use a modified version of an existing ultra-low-power...

Covert channels can be used to circumvent system and network policies by establishing communications that have not been considered in the design of the computing system. We construct a covert channel between different computing systems that utilizes audio modulation/demodulation to exchange data between the computing systems over the air medium. The underlying network stack is based on a commun...

The hypothesis that different brands and models of manufactured resilient channels have significantly different acoustical performance is common in North America. Additionally, there is ample evidence that improper installation reduces the performance of resilient channel assemblies. However, many of the differences in acoustical performance associated with brand and/or installation of resilien...

The present work investigates the acoustical absorption and scattering cross-sections of spherical bubble clouds subject to harmonic far field pressure excitation. Bubble dynamics effects and energy dissipation due to viscosity, heat transfer, liquid compressibility and relative motion of the two phases are included. The equations of motion for the average flow and for the bubble radius are lin...

Elimination of stator oscillations in electromotors is among the least studied, but important problems that can influence the electric performance, mechanical wear and tear and acoustical noise. In this paper, we focus on a switch reluctance motor (SRM) designed and prototyped for eventual production in Iran. The stator oscillation problems due to radial forces in SRMs have been reported as mor...